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- /* Copyright (C) 1994, 1995, 1996, 1997 Aladdin Enterprises. All rights reserved.
-
- This software is provided AS-IS with no warranty, either express or
- implied.
-
- This software is distributed under license and may not be copied,
- modified or distributed except as expressly authorized under the terms
- of the license contained in the file LICENSE in this distribution.
-
- For more information about licensing, please refer to
- http://www.ghostscript.com/licensing/. For information on
- commercial licensing, go to http://www.artifex.com/licensing/ or
- contact Artifex Software, Inc., 101 Lucas Valley Road #110,
- San Rafael, CA 94903, U.S.A., +1(415)492-9861.
- */
- /* $Id: srlx.h,v 1.5 2002/02/21 22:24:54 giles Exp $ */
- /* Definitions for RunLength filters */
- /* Requires scommon.h; strimpl.h if any templates are referenced */
- #ifndef srlx_INCLUDED
- # define srlx_INCLUDED
- /* Common state */
- #define stream_RL_state_common\
- stream_state_common;\
- bool EndOfData /* true if 128 = EOD */
- /* RunLengthEncode */
- typedef struct stream_RLE_state_s {
- stream_RL_state_common;
- /* The following parameters are set by the client. */
- ulong record_size;
- /* The following change dynamically. */
- ulong record_left; /* bytes left in current record */
- int copy_left; /* # of bytes waiting to be copied */
- } stream_RLE_state;
- #define private_st_RLE_state() /* in srle.c */\
- gs_private_st_simple(st_RLE_state, stream_RLE_state, "RunLengthEncode state")
- /* We define the initialization procedure here, so that clients */
- /* can avoid a procedure call. */
- #define s_RLE_set_defaults_inline(ss)\
- ((ss)->EndOfData = true, (ss)->record_size = 0)
- #define s_RLE_init_inline(ss)\
- ((ss)->record_left =\
- ((ss)->record_size == 0 ? ((ss)->record_size = max_uint) :\
- (ss)->record_size),\
- (ss)->copy_left = 0)
- extern const stream_template s_RLE_template;
- /* RunLengthDecode */
- typedef struct stream_RLD_state_s {
- stream_RL_state_common;
- /* The following change dynamically. */
- int copy_left; /* # of output bytes waiting to be produced */
- int copy_data; /* -1 if copying, repeated byte if repeating */
- } stream_RLD_state;
- #define private_st_RLD_state() /* in srld.c */\
- gs_private_st_simple(st_RLD_state, stream_RLD_state, "RunLengthDecode state")
- /* We define the initialization procedure here, so that clients */
- /* can avoid a procedure call. */
- #define s_RLD_set_defaults_inline(ss)\
- ((ss)->EndOfData = true)
- #define s_RLD_init_inline(ss)\
- ((ss)->min_left = ((ss)->EndOfData ? 1 : 0), (ss)->copy_left = 0)
- extern const stream_template s_RLD_template;
- #endif /* srlx_INCLUDED */
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